Abo Bibliothek: Guest
Catalysis in Green Chemistry and Engineering

Erscheint 4 Ausgaben pro Jahr

ISSN Druckformat: 2572-9896

ISSN Online: 2572-990X

H-Index: 2

Indexed in

SELECTIVE PRODUCTION OF ALKYL LEVULINATE DIRECTLY FROM FURFURAL VIA TRANSFER HYDROGENATION OVER ZR-BASED HETEROGENEOUS CATALYSTS

Volumen 1, Ausgabe 3, 2018, pp. 213-221
DOI: 10.1615/CatalGreenChemEng.2018028293
Get accessGet access

ABSTRAKT

A highly efficient and selective synthesis of alkyl levulinate (AL) from furfuryl alcohol (FAL) and furfural (FUR) is demonstrated. Several acid catalysts were screened for the alcoholysis of FAL in n-BuOH. In the presence of concentrated H2SO4 and Amberlyst-15, a 90% yield of butyl levulinate (BL) was achieved. The solid acids such as Sn-Mont and Zr-Mont also showed similar activity for the alcoholysis of FAL. Different ALs were prepared in excellent yields from FAL and various alcohols using Zr-Mont catalyst. The ALs were produced selectively via one-pot conversion of FUR with alcohol using a mixture of two catalysts such as Zr-Mont and ZrO(OH)2 without using an external source of hydrogen. The transfer hydrogenation of FUR to FAL proceeded over ZrO(OH)2 using alcohol as a H donor. Then in situ formed FAL underwent acid-catalyzed alcoholysis to AL over Zr-Mont. AL was obtained in 34% yield from furfural and 2-butanol. The yield of AL was significantly increased when the reaction was performed in a 2-butanol:water mixture. The maximum of 85% yield of BL was achieved with the mixture of 2-butanol: water (85:15; v/v). In the presence of water, the rate of hydrolysis of FAL is found to be enhanced. A study of the effect of temperature on reaction and catalyst recycling was also performed.

Digitales Portal Digitale Bibliothek eBooks Zeitschriften Referenzen und Berichte Forschungssammlungen Preise und Aborichtlinien Begell House Kontakt Language English 中文 Русский Português German French Spain